Welcome to the Parallax Discussion Forums, sign-up to participate.
idbruce wrote: »
So what everyone is telling me that I cannot cut aluminum with a band saw and then true the ends within a couple thousandths on a disc sander? I say bull hockey. The widest width is only 2"
... but they require a lot of effort.
It is a beginning, seems like it will be a bit time consuming unless I can 'cut and paste' some stuff.
idbruce wrote: »
Corner #1. - 5.419 in.
Corner #2. - 5.419 in.
Corner #3. - 5.421 in.
Corner #4. - 5.421 in.
0.002 in. maximum difference.
I could probably get it a little tighter, but most of the stock will be much thinner than 2", which will drastically cut down the difference, so I am happy for now. However, I may need to make it better for the screw driven actuator (Z axis), since the motor will be mounting to the end of the tubing, instead of on the side, like the belt driven actuators (X and Y).
Unless you have time to figure out how to make the Propeller convert STL to g-code, it is likely you will have to depend on Slic3r or an equivalent to do so.
The only great drawback with G-code is all dimensions are in floating point in inches or mm. It might be wonderful to have yet another software convert G-code into entirely integer representations and release the Propeller from the burden of doing a floating-point calculation for each X, Y, and Z dimension in real time.
I am pondering if this is feasible as a means to accelerate the printer speed to the max.
Congratulations. You'll be the first person in history to build a functioning 3D printer using your grandfather's rusty old bandsaw.
Publison wrote: »
Floating point calculations can be off-loaded to a dedicated FPU processor.
Parallax still carries the 32 bit FPU
A 64 bit FPU in now available here or here.
There is Propeller code available in the OBEX